+/* $Id$ */
+
+/* buf trp (transport) - buffered transport using the TCP one */
+
+/* Authors: Martin Quinson */
+/* Copyright (C) 2004 Martin Quinson. */
+
+/* This program is free software; you can redistribute it and/or modify it
+ under the terms of the license (GNU LGPL) which comes with this package. */
+
+#include <netinet/in.h> /* htonl/ntohl */
+#include <stdlib.h>
+#include <string.h> /* memset */
+
+#include "gras_private.h"
+#include "transport_private.h"
+
+GRAS_LOG_NEW_DEFAULT_SUBCATEGORY(trp_buf,transport);
+
+/***
+ *** Prototypes
+ ***/
+gras_error_t gras_trp_buf_socket_client(gras_trp_plugin_t *self,
+ const char *host,
+ unsigned short port,
+ /* OUT */ gras_socket_t *sock);
+gras_error_t gras_trp_buf_socket_server(gras_trp_plugin_t *self,
+ unsigned short port,
+ /* OUT */ gras_socket_t *sock);
+gras_error_t gras_trp_buf_socket_accept(gras_socket_t *sock,
+ gras_socket_t **dst);
+
+void gras_trp_buf_socket_close(gras_socket_t *sd);
+
+gras_error_t gras_trp_buf_chunk_send(gras_socket_t *sd,
+ const char *data,
+ long int size);
+
+gras_error_t gras_trp_buf_chunk_recv(gras_socket_t *sd,
+ char *data,
+ long int size);
+gras_error_t gras_trp_buf_flush(gras_socket_t *sock);
+
+
+/***
+ *** Specific plugin part
+ ***/
+
+typedef struct {
+ gras_trp_plugin_t *super;
+} gras_trp_buf_plug_data_t;
+
+/***
+ *** Specific socket part
+ ***/
+
+typedef struct {
+ uint32_t size;
+ char *data;
+ int pos; /* for receive; not exchanged over the net */
+} gras_trp_buf_t;
+
+struct gras_trp_bufdata_{
+ gras_trp_buf_t in;
+ gras_trp_buf_t out;
+ int buffsize;
+};
+
+gras_error_t gras_trp_buf_init_sock(gras_socket_t *sock) {
+ gras_trp_bufdata_t *data=malloc(sizeof(gras_trp_bufdata_t));
+
+ GRAS_IN;
+ if (!data)
+ RAISE_MALLOC;
+ data->in.size = 0;
+ data->in.data = NULL;
+ data->in.pos = 0; /* useless, indeed, since size==pos */
+ data->out.size = 0;
+ data->out.data = NULL;
+ data->out.pos = 0;
+ // data->buffsize = 32 * 1024 - 4; /* default socket buffsize (32k) - headers */
+ data->buffsize = 1000 * 1024 ; /* 1Mb */
+ sock->bufdata = data;
+ return no_error;
+}
+
+
+/***
+ *** Code
+ ***/
+gras_error_t
+gras_trp_buf_setup(gras_trp_plugin_t *plug) {
+ gras_error_t errcode;
+ gras_trp_buf_plug_data_t *data =malloc(sizeof(gras_trp_buf_plug_data_t));
+ if (!data)
+ RAISE_MALLOC;
+
+ GRAS_IN;
+ TRY(gras_trp_plugin_get_by_name(gras_if_RL() ? "tcp" : "sg",
+ &(data->super)));
+ DEBUG1("Derivate a buffer plugin from %s",gras_if_RL() ? "tcp" : "sg");
+
+ plug->socket_client = gras_trp_buf_socket_client;
+ plug->socket_server = gras_trp_buf_socket_server;
+ plug->socket_accept = gras_trp_buf_socket_accept;
+ plug->socket_close = gras_trp_buf_socket_close;
+
+ plug->chunk_send = gras_trp_buf_chunk_send;
+ plug->chunk_recv = gras_trp_buf_chunk_recv;
+
+ plug->flush = gras_trp_buf_flush;
+
+ plug->data = (void*)data;
+ plug->exit = NULL;
+
+ return no_error;
+}
+
+gras_error_t gras_trp_buf_socket_client(gras_trp_plugin_t *self,
+ const char *host,
+ unsigned short port,
+ /* OUT */ gras_socket_t *sock){
+ gras_error_t errcode;
+ gras_trp_plugin_t *super=((gras_trp_buf_plug_data_t*)self->data)->super;
+
+ GRAS_IN;
+ TRY(super->socket_client(super,host,port,sock));
+ sock->plugin = self;
+ TRY(gras_trp_buf_init_sock(sock));
+
+ return no_error;
+}
+
+/**
+ * gras_trp_buf_socket_server:
+ *
+ * Open a socket used to receive messages.
+ */
+gras_error_t gras_trp_buf_socket_server(gras_trp_plugin_t *self,
+ unsigned short port,
+ /* OUT */ gras_socket_t *sock){
+ gras_error_t errcode;
+ gras_trp_plugin_t *super=((gras_trp_buf_plug_data_t*)self->data)->super;
+
+ GRAS_IN;
+ TRY(super->socket_server(super,port,sock));
+ sock->plugin = self;
+ TRY(gras_trp_buf_init_sock(sock));
+ return no_error;
+}
+
+gras_error_t
+gras_trp_buf_socket_accept(gras_socket_t *sock,
+ gras_socket_t **dst) {
+ gras_error_t errcode;
+ gras_trp_plugin_t *super=((gras_trp_buf_plug_data_t*)sock->plugin->data)->super;
+
+ GRAS_IN;
+ TRY(super->socket_accept(sock,dst));
+ (*dst)->plugin = sock->plugin;
+ TRY(gras_trp_buf_init_sock(*dst));
+ return no_error;
+}
+
+void gras_trp_buf_socket_close(gras_socket_t *sock){
+ gras_trp_plugin_t *super=((gras_trp_buf_plug_data_t*)sock->plugin->data)->super;
+ gras_trp_bufdata_t *data=sock->bufdata;
+
+ GRAS_IN;
+ if (data->in.size || data->out.size)
+ gras_trp_buf_flush(sock);
+ if (data->in.data)
+ free(data->in.data);
+ if (data->out.data)
+ free(data->out.data);
+ free(data);
+
+ return super->socket_close(sock);
+}
+
+/**
+ * gras_trp_buf_chunk_send:
+ *
+ * Send data on a TCP socket
+ */
+gras_error_t
+gras_trp_buf_chunk_send(gras_socket_t *sock,
+ const char *chunk,
+ long int size) {
+
+ gras_error_t errcode;
+ gras_trp_bufdata_t *data=(gras_trp_bufdata_t*)sock->bufdata;
+ int chunk_pos=0;
+
+ GRAS_IN;
+ /* Let underneath plugin check for direction, we work even in duplex */
+ gras_assert0(size >= 0, "Cannot send a negative amount of data");
+
+ if (!data->out.data && !(data->out.data = malloc(data->buffsize)))
+ RAISE_MALLOC;
+
+ while (chunk_pos < size) {
+ /* size of the chunck to receive in that shot */
+ long int thissize = min(size-chunk_pos,data->buffsize - data->out.size);
+ DEBUG5("Set the chars %d..%ld into the buffer (size=%ld, ctn='%.*s')",
+ (int)data->out.size,
+ ((int)data->out.size) + thissize -1,
+ size, chunk_pos, chunk);
+
+ memcpy(data->out.data + data->out.size, chunk + chunk_pos, thissize);
+
+ data->out.size += thissize;
+ chunk_pos += thissize;
+ DEBUG5("New pos = %d; Still to send = %ld of %ld; ctn sofar='%.*s'",
+ data->out.size,size-chunk_pos,size,(int)chunk_pos,chunk);
+
+ if (data->out.size == data->buffsize) /* out of space. Flush it */
+ TRY(gras_trp_buf_flush(sock));
+ }
+
+ GRAS_OUT;
+ return no_error;
+}
+
+/**
+ * gras_trp_buf_chunk_recv:
+ *
+ * Receive data on a TCP socket.
+ */
+gras_error_t
+gras_trp_buf_chunk_recv(gras_socket_t *sock,
+ char *chunk,
+ long int size) {
+
+ gras_error_t errcode;
+ gras_trp_plugin_t *super=((gras_trp_buf_plug_data_t*)sock->plugin->data)->super;
+ gras_trp_bufdata_t *data=sock->bufdata;
+ long int chunck_pos = 0;
+
+ /* Let underneath plugin check for direction, we work even in duplex */
+ gras_assert0(sock, "Cannot recv on an NULL socket");
+ gras_assert0(size >= 0, "Cannot receive a negative amount of data");
+
+ GRAS_IN;
+ if (!data->in.data && !(data->in.data = malloc(data->buffsize)))
+ RAISE_MALLOC;
+
+ while (chunck_pos < size) {
+ /* size of the chunck to receive in that shot */
+ long int thissize;
+
+ if (data->in.size == data->in.pos) { /* out of data. Get more */
+ uint32_t nextsize;
+ DEBUG0("Recv the size");
+ TRY(super->chunk_recv(sock,(char*)&nextsize, 4));
+ data->in.size = ntohl(nextsize);
+
+ VERB1("Recv the chunk (size=%d)",data->in.size);
+ TRY(super->chunk_recv(sock, data->in.data, data->in.size));
+ data->in.pos=0;
+ }
+
+ thissize = min(size-chunck_pos , data->in.size - data->in.pos);
+ DEBUG2("Get the chars %d..%ld out of the buffer",
+ data->in.pos,
+ data->in.pos + thissize - 1);
+ memcpy(chunk+chunck_pos, data->in.data + data->in.pos, thissize);
+
+ data->in.pos += thissize;
+ chunck_pos += thissize;
+ DEBUG5("New pos = %d; Still to receive = %ld of %ld. Ctn so far='%.*s'",
+ data->in.pos,size - chunck_pos,size,(int)chunck_pos,chunk);
+ }
+
+ GRAS_OUT;
+ return no_error;
+}
+
+/**
+ * gras_trp_buf_flush:
+ *
+ * Make sure the data is sent
+ */
+gras_error_t
+gras_trp_buf_flush(gras_socket_t *sock) {
+ gras_error_t errcode;
+ uint32_t size;
+ gras_trp_plugin_t *super=((gras_trp_buf_plug_data_t*)sock->plugin->data)->super;
+ gras_trp_bufdata_t *data=sock->bufdata;
+
+ GRAS_IN;
+ size = htonl(data->out.size);
+ DEBUG1("Send the size (=%d)",data->out.size);
+ TRY(super->chunk_send(sock,(char*) &size, 4));
+
+ DEBUG1("Send the chunk (size=%d)",data->out.size);
+ TRY(super->chunk_send(sock, data->out.data, data->out.size));
+ VERB1("Chunk sent (size=%d)",data->out.size);
+ data->out.size = 0;
+ return no_error;
+}
